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refactor: 💥 from now unit_symbol and dimension_symbol always returns std::string_view

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Mateusz Pusz
2024-11-16 09:57:53 +01:00
parent 2c24c61da5
commit 7b64b4b650
9 changed files with 37 additions and 113 deletions
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17
example/currency.cpp
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@@ -62,21 +62,6 @@ inline constexpr auto JPY = japanese_jen;
static_assert(!std::equality_comparable_with<quantity<euro, int>, quantity<us_dollar, int>>);
#if 0 || !MP_UNITS_API_STRING_VIEW_RET // NOLINT(readability-avoid-unconditional-preprocessor-if)
// if you have only a few currencies to handle
template<Unit auto From, Unit auto To>
[[nodiscard]] double exchange_rate(std::chrono::sys_seconds timestamp)
{
(void)timestamp; // get conversion ratios for this timestamp
if constexpr (From == us_dollar && To == euro) return 0.9215;
else if constexpr (From == euro && To == us_dollar) return 1.0848;
// ...
}
#else
template<Unit auto From, Unit auto To>
[[nodiscard]] double exchange_rate(std::chrono::sys_seconds timestamp)
{
@@ -89,8 +74,6 @@ template<Unit auto From, Unit auto To>
return rates.at(std::make_pair(unit_symbol(From), unit_symbol(To)));
}
#endif
template<UnitOf<currency> auto To, QuantityOf<currency> From>
QuantityOf<currency> auto exchange_to(From q, std::chrono::sys_seconds timestamp)
{